4CNJ

L-Aminoacetone oxidase from Streptococcus oligofermentans belongs to a new 3-domain family of bacterial flavoproteins


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Aminoacetone Oxidase from Streptococcus Oligofermentas Belongs to a New Three-Domain Family of Bacterial Flavoproteins.

Molla, G.Nardini, M.Motta, P.D'Arrigo, P.Panzeri, W.Pollegioni, L.

(2014) Biochem.J. 464: 387

  • DOI: 10.1042/BJ20140972
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The aaoSo gene from Streptococcus oligofermentans encodes a 43 kDa flavoprotein, aminoacetone oxidase (SoAAO), which was reported to possess a low catalytic activity against several different L-amino acids; accordingly, it was classified as an L-amin ...

    The aaoSo gene from Streptococcus oligofermentans encodes a 43 kDa flavoprotein, aminoacetone oxidase (SoAAO), which was reported to possess a low catalytic activity against several different L-amino acids; accordingly, it was classified as an L-amino acid oxidase. Subsequently, SoAAO was demonstrated to oxidize aminoacetone (a pro-oxidant metabolite), with an activity ~25-fold higher than the activity displayed on L-lysine, thus lending support to the assumption of aminoacetone as the preferred substrate. In the present study, we have characterized the SoAAO structure-function relationship. SoAAO is an FAD-containing enzyme that does not possess the classical properties of the oxidase/dehydrogenase class of flavoproteins (i.e. no flavin semiquinone formation is observed during anaerobic photoreduction as well as no reaction with sulfite) and does not show a true L-amino acid oxidase activity. From a structural point of view, SoAAO belongs to a novel protein family composed of three domains: an α/β domain corresponding to the FAD-binding domain, a β-domain partially modulating accessibility to the coenzyme, and an additional α-domain. Analysis of the reaction products of SoAAO on aminoacetone showed 2,5-dimethylpyrazine as the main product; we propose that condensation of two aminoacetone molecules yields 3,6-dimethyl-2,5-dihydropyrazine that is subsequently oxidized to 2,5-dimethylpyrazine. The ability of SoAAO to bind two molecules of the substrate analogue O-methylglycine ligand is thought to facilitate the condensation reaction. A specialized role for SoAAO in the microbial defence mechanism related to aminoacetone catabolism through a pathway yielding dimethylpyrazine derivatives instead of methylglyoxal can be proposed.


    Organizational Affiliation

    *Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi deII'Insubria, via J.H. Dunant 3, 21100 Varese, ltaly.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-AMINO ACID OXIDASE
A, B, C, D
391Streptococcus cristatusMutation(s): 0 
Find proteins for B1PUC6 (Streptococcus cristatus)
Go to UniProtKB:  B1PUC6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, B, C, D
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.188 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 79.149α = 90.00
b = 130.346β = 90.00
c = 224.199γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
SCALAdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-15
    Type: Initial release
  • Version 1.1: 2014-12-17
    Type: Database references